CN108277903B - Assembled truss type light steel frame-punched thin steel plate-concrete combined wall - Google Patents

Abstract

The invention relates to an assembled truss type light steel frame-punched thin steel plate-concrete combined wall and a manufacturing method thereof. According to the invention, the steel tube concrete frame columns, the steel tube concrete frame beams and the wall steel tube concrete truss ribs are combined to form a wall steel tube concrete truss stress system, and form a combined wall steel skeleton together with the punched thin steel plate, so that the integrity of the wall plate is improved, the concrete is poured by supporting a formwork, the assembled truss type light steel frame-punched thin steel plate-concrete combined wall is formed after curing, and the combined wall is assembled to an external structure only through connecting bolts. The assembled combined wall has good bending resistance, shearing resistance and plane external rigidity, and good anti-seismic performance, and meanwhile, the wall boards are produced by factories and assembled on site, so that the common quality problems caused by site construction are effectively solved, the engineering construction efficiency is greatly improved, the engineering labor is reduced, and the assembled combined wall is suitable for being widely popularized and applied in low-multi-layer rural house structures in villages and small towns.

Description

Prefabricated truss type light steel frame - punched thin steel plate - concrete composite wall

Technical field:

The invention belongs to the technical field of fabrication of prefabricated composite walls in building structure engineering, and particularly relates to a prefabricated truss-type light steel frame-punched thin steel plate-concrete composite wall and a method thereof.

Background technique:

At present, my country is in a period of vigorous development of new urbanization and new rural construction. The large-scale and wide-ranging new rural construction and the urgent new rural reconstruction goal make simple integrated houses and low-rise prefabricated houses begin to be used in low-rise and multi-storey farm houses. developed in the structure. At this stage, integrated houses and prefabricated houses mostly use beam-column frames composed of steel structural components or steel-concrete structural components as the main stress system of the house structure. Excellent features such as flexibility and short construction period. However, at the same time, as the main components of the house structure, the external wall panel and the infill wall panel can only be used as the enclosure components of the house and cannot participate in the force, so there are problems of low bearing capacity, poor ductility and brittle failure of the house structure. The overall housing also has problems of poor stability and poor earthquake resistance, which greatly restricts the application of integrated houses and prefabricated houses in residential buildings.

The construction volume of villages and towns in my country accounts for 60% of the total construction volume of the country. Most of the rural houses are located in the earthquake-resistant fortified areas. How to reasonably design and use the walls to improve the bearing capacity of low-rise integrated houses and prefabricated houses and enhance their seismic capacity without affecting them? With the advantage of flexible spatial layout, the application of walls with bearing capacity and anti-seismic functions to low-rise buildings, especially low-rise buildings in villages and towns during the period of new rural construction, is the driving force for promoting new urbanization and new rural construction in my country. The essential.

Therefore, it is of great practical significance and social and economic value to develop a prefabricated composite wall that is economical, practical, low-cost, and easy to construct, suitable for low-rise buildings, especially low-storey rural houses in villages and towns.

Invention content:

The invention provides a prefabricated truss-type light steel frame-punched thin steel plate-concrete composite wall, which provides a prefabricated wall with better bearing capacity and earthquake resistance for low-level multi-storey integrated houses and prefabricated houses This method is suitable for low-rise buildings with seismic fortification requirements, especially low-storey farm houses in villages and towns, to solve the current situation that the structure of farm houses lacks seismic measures and has weak seismic capacity. At the same time, the on-site assembly and construction of the components are simple, which can promote the completion of the new rural construction and development goals.

To achieve the above object, the present invention adopts the following technical solutions:

An assembled truss-type light steel frame-punched thin steel plate-concrete composite wall, comprising a concrete-filled steel tube frame column (1), a concrete-filled steel tube frame beam (2), a punched thin steel plate (3), and a concrete-filled steel tube truss rib (4) ), concrete (5), connecting end plates (6) and connecting bolts (7); the punched thin steel plate (3) is a steel plate with holes punched out by a punch on a steel plate with a thickness of no more than 5 mm through a die, The hole center distance is not less than 50mm, and the punching area is not less than 1/2 of the area of the punched thin steel plate (3). The bolt holes are prefabricated on the connecting end plates (6); the CFST frame columns (1) are welded with the CFST frame beams (2) to form a composite wall light steel frame frame, and the punched thin steel plate (3) is welded inside the frame, and then punched Concrete-filled steel tube truss ribs (4) are arranged crosswise on both sides of the hole thin steel plate, and both ends of the concrete-filled steel tube truss rib (4) are welded and fixed to the frame frame of the light steel frame of the composite wall. At this point, the steel frame of the composite wall is formed; the formwork is poured into the wall slab concrete (5). ), after curing, an assembled truss-type light steel frame-punched thin steel plate-concrete composite wall is formed; during assembly, the composite wall and the external structure are connected by connecting bolts (7).

The assembled truss-type light steel frame-punched thin steel plate-concrete composite wall is characterized in that:

The CFST frame column (1) and the CFST frame beam (2) are made of square or rectangular steel pipes, the wall thickness of the steel pipes is not more than 8mm, the side lengths of the steel pipes are not less than 50mm, and the pipes are filled with concrete. CFST has a high shear bearing capacity, and the CFST frame column (1) and the CFST frame beam (2) are welded to form a composite wall light steel frame frame, which significantly increases the shear strength of the wall panel.

The punched thin steel plate (3) is a steel plate with circular holes, square holes or rectangular holes punched out by a punching machine through a die. ) middle. After the punched thin steel plate (3) is positioned, it is welded and fixed with the concrete-filled steel tube frame of the wall plate, and it is poured into the concrete to play the role of reinforcement. , low cost and other characteristics, improve the out-of-plane rigidity of the wall panel, and improve the seismic capacity of the wall panel.

The concrete-filled steel tube truss rib (4) is made of square or rectangular steel tube filled with concrete, the wall thickness of the steel tube is not more than 5 mm, and the wall body CFST truss rib (4) and the wall are arranged crosswise on both sides of the punched thin steel plate (3). The frame frame of the body light steel frame together forms the stress skeleton of the wall panel truss; when the concrete (5) is poured, part or all of the concrete-filled steel tube truss rib (4) is poured in the wall panel. The setting of the concrete-filled steel tube truss rib (4) increases the bending resistance, shear resistance and out-of-plane bearing capacity of the wall panel, and improves the seismic resistance level of the wall panel.

The concrete (5) has a pouring thickness of 40mm-100mm, and a concrete strength grade of C30-C60; the concrete (5) is ordinary concrete, recycled concrete or high-performance concrete with different recycled coarse aggregate contents. Recycled concrete is prepared from the concrete aggregate obtained by crushing, cleaning and grading waste concrete blocks after the demolition of old buildings. The role of protecting the environment and saving resources has significant social benefits and promotes the sustainable development of the country. According to the needs of the project, high-performance concrete with anti-cracking and anti-corrosion properties can be configured.

The thickness of the steel plate used in the connecting end plate (6) is not less than 6 mm, and the connecting end plate is machined with bolt holes corresponding to the diameters of the connecting bolts (7). When the connecting end plate (6) is welded with the concrete-filled steel tubular frame column (1), a stiffening rib may be welded to strengthen the connection.

The connecting bolts (7) are not less than M16 and the strength is not less than 8.8. When the composite wall is installed, the connecting bolts (7) on each connecting end plate (6) are not less than 4.

Compared with the prior art, the assembled truss-type light steel frame-punched thin steel plate-concrete composite wall of the present invention has the following advantages:

(1) The traditional prefabricated walls are mostly external wall panels or large module infill walls, which can only be used as the enclosure components of the house and cannot participate in the force. Therefore, the overall stability of the house structure is poor, the bearing capacity is low, the ductility is poor, and the seismic capacity To solve the problem of weak and brittle failure, the assembled truss-type light steel frame-punched thin steel plate-concrete composite wall provided by the present invention acts as a stressed member in the structure, has good bearing capacity and seismic capacity, and is suitable for Low-storey buildings with seismic fortification requirements, especially low-storey farm houses in villages and towns, are widely promoted to promote the completion of new rural construction and development goals.

(2) The composite wall is selectively arranged in the column network as an anti-seismic unit, and is arranged in the weak position of the low-storey building structure, thereby increasing the lateral stiffness and seismic capacity of the building structure without affecting the building bay and layout.

(3) The CFST frame column, the CFST frame beam and the CFST truss rib together form the CFST truss stress system in the wall panel, which changes the damage and failure mode of the wall, and can effectively improve the bearing capacity and ductility of the wall.

(4) The design of the frame frame of the light steel frame formed by the concrete-filled steel tube frame beams and columns improves the integrity of the wall panel and makes up for the knock angle that is easy to occur during the lifting, transportation and construction process at the frame position of the concrete thin wall panel member. , fragmentation affects the use of thin concrete wall panels, and improves the quality of prefabricated wall panels.

(5) The punched thin steel plate plays the role of reinforcement in the concrete wall panel, but it is easier to construct than the configuration of steel bars, easy to locate, has the characteristics of strong integrity, uniform mesh, easy processing, low cost, etc. The out-of-plane stiffness of the panel improves the seismic capacity of the wall panel.

(6) The design of the steel skeleton of the wall panel formed by the concrete filled steel tube and the punched thin steel plate increases the bending resistance, shear resistance and out-of-plane bearing capacity of the wall panel, improves the seismic performance of the wall panel, and extends the present invention to the structure of the farm house , In the face of large-scale and wide-scale reconstruction of low-rise farm houses, it can quickly and effectively improve the seismic performance of farm houses.

(7) The thickness of the concrete layer of the wall panel is thin and the dead weight is light, which is conducive to transportation and assembly on the construction site. At the same time, concrete-filled steel tubes and wall panel concrete can use green and environmentally friendly recycled concrete, which is conducive to promoting the national sustainable development goals.

(8) Most of the traditional earthquake-resistant walls are cast-in-place components. The composite wall of the present invention is a prefabricated component, which is prefabricated in the factory, and the pouring quality of the wall panels is guaranteed. construction time. The prefabricated structural form can quickly and effectively improve the seismic performance of the house, which greatly promotes the realization of residential industrialization and urbanization construction. Improvements in technology play an important role.

Description of drawings:

Figure 1 is a partial schematic diagram of an assembled truss-type light steel frame-punched sheet steel-concrete composite wall;

Figure 2 is a partial schematic diagram of the assembled truss-type light steel frame-punched sheet steel-concrete composite wall steel frame;

Figure 3 is an assembly effect diagram of an assembled truss-type light steel frame-punched thin steel plate-concrete composite wall.

In the figure: 1- CFST frame column; 2- CFST frame beam; 3- punched thin steel plate; 4- CFST truss rib; 5- concrete; 6- connecting end plate; 7- connecting bolt.

Detailed ways:

The prefabricated truss-type light steel frame-punched thin steel plate-concrete composite wall in the invention is explained as follows with reference to the accompanying drawings 1-3:

The first step: pour concrete in the steel pipe and maintain it to form the CFST frame column, the CFST frame beam and the CFST truss rib of the wall; The end plates are respectively welded on the top and bottom of each CFST frame column; the CFST frame column and the CFST frame beam are welded to form a composite wall light steel frame frame.

Step 2: Weld the punched thin steel plate in the frame of the light steel frame of the composite wall, and then arrange the concrete-filled steel tube truss ribs on both sides of the punched thin steel plate, and both ends of the ribs are welded and fixed on the frame frame of the light steel frame of the composite wall. Form a composite wall steel skeleton.

The third step: make the wall panel pouring formwork, configure the concrete, pour the wall panel concrete, and form an assembled truss-type light steel frame-punched thin steel plate-concrete composite wall after curing. When the composite wall is assembled, it is installed and connected to the external structure through connecting bolts.

The above is a typical implementation case of the present invention, but the implementation of the present invention is not limited to this. The selection of each structure size and material listed in the present invention can be selected according to actual needs, and will not be listed one by one here.

Claims (8)

1. The assembled truss type light steel frame-punched thin steel plate-concrete combined wall is characterized in that: the steel pipe concrete truss structure comprises a steel pipe concrete frame column (1), a steel pipe concrete frame beam (2), a punching thin steel plate (3), a steel pipe concrete truss rib (4), concrete (5), a connecting end plate (6) and a connecting bolt (7);

the punching thin steel plate (3) is a steel plate with a hole punched by a punch through a die on a steel plate with the plate thickness not more than 5mm, the hole center distance is not less than 50mm, and the punching area is not less than 1/2 of the area of the punching thin steel plate (3);

respectively welding and connecting end plates (6) at the positions of the top and the base of the steel pipe concrete frame column (1), and prefabricating bolt holes on the connecting end plates (6); the steel tube concrete frame column (1) is welded with the steel tube concrete frame beam (2) to form a combined wall light steel frame, a punching thin steel plate (3) is welded inside the frame, then steel tube concrete truss ribs (4) are arranged on two sides of the punching thin steel plate in a crossed mode, two ends of each steel tube concrete truss rib (4) are welded and fixed with the combined wall light steel frame, and therefore the combined wall steel frame is formed; erecting a formwork and pouring wallboard concrete (5), and curing to form an assembled truss type light steel frame-punched thin steel plate-concrete combined wall; during assembly, the combined wall is connected with the external frame structure beam through the connecting bolt (7).

2. The fabricated truss type light steel frame-punched steel sheet-concrete composite wall as claimed in claim 1, wherein: the steel pipe concrete frame column (1) and the steel pipe concrete frame beam (2) are rectangular steel pipes, the wall thickness of each steel pipe is not more than 8mm, the side length of the section of each steel pipe is not less than 50mm, and concrete is filled in the steel pipes.

3. The fabricated truss type light steel frame-punched steel sheet-concrete composite wall as claimed in claim 1, wherein: the punching thin steel plate (3) is a steel plate with a circular hole or a rectangular hole punched by a die, and the punching thin steel plate (3) is arranged in the middle of the frame of the light steel frame of the wallboard and is poured in the middle of the concrete (5).

4. The fabricated truss type light steel frame-punched steel sheet-concrete composite wall as claimed in claim 1, wherein: the steel pipe concrete truss ribs (4) are formed by filling rectangular steel pipes with concrete, the wall thickness of the steel pipes is not more than 5mm, and the steel pipe concrete truss ribs (4) which are arranged on two sides of the punching thin steel plate (3) in a crossed mode form a wallboard truss stress framework together with a wall steel pipe concrete frame; when the concrete (5) is poured, the steel pipe concrete truss ribs (4) are partially or completely poured in the wall boards.

5. The fabricated truss type light steel frame-punched steel sheet-concrete composite wall as claimed in claim 1, wherein: the casting thickness of the concrete (5) is 40-100 mm, and the concrete strength grade is C30-C60.

6. The fabricated truss type light steel frame-punched steel sheet-concrete composite wall as claimed in claim 1, wherein: the thickness of the steel plate adopted by the connecting end plate (6) is not less than 6mm, and bolt holes corresponding to the aperture of the connecting bolts (7) are machined in the connecting end plate.

7. The fabricated truss type light steel frame-punched steel sheet-concrete composite wall as claimed in claim 1, wherein: the connecting bolts (7) are not less than M16, the strength is not less than 8.8 grade, and when the combined wall is installed, the number of the connecting bolts (7) on each connecting end plate (6) is not less than 4.

8. The fabricated truss type light steel frame-punched thin steel plate-concrete composite wall as claimed in any one of claims 1 to 7, which is fabricated by the following method:

the first step is as follows: pouring concrete in the steel pipe and curing to form a steel pipe concrete frame column, a steel pipe concrete frame beam and a steel pipe concrete truss rib of the wallboard; processing bolt holes corresponding to the diameters of the connecting bolts on the connecting end plates, and then respectively welding the connecting end plates to the top and the bottom of each steel pipe concrete frame column; welding the steel pipe concrete frame column and the steel pipe concrete frame beam to form a light steel frame of the combined wall;

the second step is that: welding a punched thin steel plate in the combined wall light steel frame, then arranging steel pipe concrete truss ribs on two sides of the punched thin steel plate in a crossed manner, and welding and fixing two ends of each rib on the combined wall light steel frame to form a combined wall steel frame;

the third step: manufacturing a wallboard pouring template, configuring concrete, pouring the wallboard concrete, and curing to form the assembled truss type light steel frame-punched thin steel plate-concrete combined wall; when the combined wall is assembled, the combined wall and the external frame structure beam are installed and connected through the connecting bolts.

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